Initial commit

backends/fs/posix-drives/posix-drives-fs.cpp

@@ -0,0 +1,193 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#if defined(POSIX) || defined(PSP2) || defined(__DS__)
+
+#define FORBIDDEN_SYMBOL_ALLOW_ALL
+
+#include "backends/fs/posix-drives/posix-drives-fs.h"
+#include "backends/fs/posix/posix-iostream.h"
+
+#include "common/algorithm.h"
+#include "common/bufferedstream.h"
+
+#include <dirent.h>
+
+DrivePOSIXFilesystemNode::DrivePOSIXFilesystemNode(const Common::String &path, const Config &config) :
+		POSIXFilesystemNode(path),
+		_isPseudoRoot(false),
+		_config(config) {
+
+	if (isDrive(path)) {
+		_isDirectory = true;
+		_isValid = true;
+
+		// FIXME: Add a setting for deciding whether drive paths need to end with a slash
+		if (!_path.hasSuffix("/")) {
+			_path += "/";
+		}
+		return;
+	}
+}
+
+DrivePOSIXFilesystemNode::DrivePOSIXFilesystemNode(const Config &config) :
+		_isPseudoRoot(true),
+		_config(config) {
+	_isDirectory = true;
+	_isValid = false;
+}
+
+void DrivePOSIXFilesystemNode::configureStream(StdioStream *stream) {
+	if (!stream) {
+		return;
+	}
+
+	if (_config.bufferingMode != kBufferingModeStdio) {
+		// Disable stdio buffering
+		stream->setBufferSize(0);
+	} else if (_config.bufferSize) {
+		stream->setBufferSize(_config.bufferSize);
+	}
+}
+
+Common::SeekableReadStream *DrivePOSIXFilesystemNode::createReadStream() {
+	StdioStream *readStream = PosixIoStream::makeFromPath(getPath(), StdioStream::WriteMode_Read);
+
+	configureStream(readStream);
+
+	if (_config.bufferingMode == kBufferingModeScummVM) {
+		uint32 bufferSize = _config.bufferSize != 0 ? _config.bufferSize : 1024;
+		return Common::wrapBufferedSeekableReadStream(readStream, bufferSize, DisposeAfterUse::YES);
+	}
+
+	return readStream;
+}
+
+Common::SeekableWriteStream *DrivePOSIXFilesystemNode::createWriteStream(bool atomic) {
+	StdioStream *writeStream = PosixIoStream::makeFromPath(getPath(), atomic ?
+			StdioStream::WriteMode_WriteAtomic : StdioStream::WriteMode_Write);
+
+	configureStream(writeStream);
+
+	if (_config.bufferingMode == kBufferingModeScummVM) {
+		uint32 bufferSize = _config.bufferSize != 0 ? _config.bufferSize : 1024;
+		return Common::wrapBufferedWriteStream(writeStream, bufferSize);
+	}
+
+	return writeStream;
+}
+
+DrivePOSIXFilesystemNode *DrivePOSIXFilesystemNode::getChildWithKnownType(const Common::String &n, bool isDirectoryFlag) const {
+	assert(_isDirectory);
+
+	// Make sure the string contains no slashes
+	assert(!n.contains('/'));
+
+	Common::String newPath(_path);
+	if (_path.lastChar() != '/')
+		newPath += '/';
+	newPath += n;
+
+	DrivePOSIXFilesystemNode *child = reinterpret_cast<DrivePOSIXFilesystemNode *>(makeNode());
+	child->_path = newPath;
+	child->_isValid = true;
+	child->_isPseudoRoot = false;
+	child->_isDirectory = isDirectoryFlag;
+	child->_displayName = n;
+
+	return child;
+}
+
+AbstractFSNode *DrivePOSIXFilesystemNode::getChild(const Common::String &n) const {
+	DrivePOSIXFilesystemNode *child = getChildWithKnownType(n, false);
+	child->setFlags();
+
+	return child;
+}
+
+bool DrivePOSIXFilesystemNode::getChildren(AbstractFSList &list, AbstractFSNode::ListMode mode, bool hidden) const {
+	assert(_isDirectory);
+
+	if (_isPseudoRoot) {
+		return _config.getDrives(list, hidden);
+	} else {
+		DIR *dirp = opendir(_path.c_str());
+		struct dirent *dp;
+
+		if (!dirp)
+			return false;
+
+		while ((dp = readdir(dirp)) != nullptr) {
+			// Skip 'invisible' files if necessary
+			if (dp->d_name[0] == '.' && !hidden) {
+				continue;
+			}
+
+			// Skip '.' and '..' to avoid cycles
+			if ((dp->d_name[0] == '.' && dp->d_name[1] == 0) || (dp->d_name[0] == '.' && dp->d_name[1] == '.')) {
+				continue;
+			}
+
+			AbstractFSNode *child = nullptr;
+
+#if !defined(SYSTEM_NOT_SUPPORTING_D_TYPE)
+			if (dp->d_type == DT_DIR || dp->d_type == DT_REG) {
+				child = getChildWithKnownType(dp->d_name, dp->d_type == DT_DIR);
+			} else
+#endif
+			{
+				child = getChild(dp->d_name);
+			}
+
+			// Honor the chosen mode
+			if ((mode == Common::FSNode::kListFilesOnly && child->isDirectory()) ||
+				(mode == Common::FSNode::kListDirectoriesOnly && !child->isDirectory())) {
+				delete child;
+				continue;
+			}
+
+			list.push_back(child);
+		}
+
+		closedir(dirp);
+
+		return true;
+	}
+}
+
+AbstractFSNode *DrivePOSIXFilesystemNode::getParent() const {
+	if (_isPseudoRoot) {
+		return nullptr;
+	}
+
+	if (isDrive(_path)) {
+		return makeNode();
+	}
+
+	return POSIXFilesystemNode::getParent();
+}
+
+bool DrivePOSIXFilesystemNode::isDrive(const Common::String &path) const {
+	Common::String normalizedPath = Common::normalizePath(path, '/');
+	return _config.isDrive(normalizedPath);
+}
+
+#endif //#if defined(POSIX)